CN108028744B - Method for carrier aggregation, network node and computer-readable storage medium - Google Patents
Method for carrier aggregation, network node and computer-readable storage medium Download PDFInfo
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- CN108028744B CN108028744B CN201680055292.6A CN201680055292A CN108028744B CN 108028744 B CN108028744 B CN 108028744B CN 201680055292 A CN201680055292 A CN 201680055292A CN 108028744 B CN108028744 B CN 108028744B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
- H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/14—Two-way operation using the same type of signal, i.e. duplex
- H04L5/1469—Two-way operation using the same type of signal, i.e. duplex using time-sharing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/08—Access point devices
- H04W88/10—Access point devices adapted for operation in multiple networks, e.g. multi-mode access points
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Abstract
A network node and a method for performing carrier aggregation in a wireless telecommunication network are disclosed. The method is for allocating resource blocks to support carrier aggregation communication between network nodes of a wireless telecommunications network and comprises: allocating a first uplink resource block within at least one uplink frequency band for uplink primary component carrier usage; and allocating second uplink resource blocks within the at least one uplink frequency band for use by the at least one uplink secondary component carrier, the first uplink resource blocks allocated for use by the uplink primary component carrier being allocated from resource blocks within the at least one uplink frequency band which are closer to resource blocks within the at least one downlink frequency band than the second uplink resource blocks allocated for use by the at least one uplink secondary component carrier.
Description
Technical Field
The present invention relates to a network node and a method for performing carrier aggregation in a wireless telecommunication network.
Background
Wireless telecommunications networks are known. In cellular systems, radio coverage is provided to user equipment (e.g., mobile phones) over a geographic area. Those geographical areas of radio coverage are referred to as cells. A base station is located in each geographical area to provide the required radio coverage and to support communication with user equipment. A base station may support more than one cell providing coverage in the same geographic area. User equipments in an area served by a base station receive information and data from the base station and transmit information and data to the base station. Information and data transmitted by the base station to the user equipment occurs on frequency channels of radio carriers known as downlink carriers. Information and data transmitted by the user equipment to the base station occur on frequency channels of radio carriers known as uplink carriers.
In some implementations, carrier aggregation may occur in scenarios where a user equipment may transmit on more than one uplink carrier simultaneously. Still further, the user equipment may receive on more than one downlink carrier simultaneously. Each carrier, both uplink and downlink, is typically independently power controlled and independently scheduled by the base station. Such networks are referred to as "multiple component carrier" networks. Multi-component carrier networks can significantly improve end-user data throughput.
In a multi-component carrier network, a plurality of component carriers may be configured for communication between a base station and a user equipment on a downlink carrier and/or an uplink carrier within a downlink frequency band and/or an uplink frequency band. Typically, any one of the downlink component carriers may be used to carry signaling messages including an uplink transmission resource grant that permits a user equipment to transmit user data on an available uplink component carrier. An uplink grant of network resources sent on a particular downlink component carrier may assign uplink network resources on one particular uplink component carrier according to a default or predetermined correspondence between uplink and downlink component carriers. Alternatively, any given downlink component carrier may allocate network resources by assigning uplink network resources on any uplink component carrier by means of a component carrier indicator included in a resource allocation message sent from the base station to the user equipment allocating network resources.
Although carrier aggregation provides performance advantages, unexpected consequences may occur.
Disclosure of Invention
According to a first aspect, there is provided a method of allocating resource blocks to support carrier aggregation communication between network nodes of a wireless telecommunications network, comprising: allocating a first uplink resource block within at least one uplink frequency band for uplink primary component carrier usage; and allocating second uplink resource blocks within the at least one uplink frequency band for use by the at least one uplink secondary component carrier, the first uplink resource blocks allocated for use by the uplink primary component carrier being allocated from resource blocks within the at least one uplink frequency band which are closer to resource blocks within the at least one downlink frequency band than the second uplink resource blocks allocated for use by the at least one uplink secondary component carrier.
The first aspect recognizes that the problem of supporting carrier aggregation is that there may be multiple implementations when carrier aggregation is performed with more than one uplink carrier. Some of these implementations place higher performance requirements on the user equipment than others and it is desirable to ensure reliable communication even in the most demanding implementations. In particular, an uplink configuration for user equipment receiver requirements (reference sensitivity, etc.) for mixed intra-band and inter-band Long Term Evolution (LTE) carrier aggregation with two uplink carriers and three or four downlink carriers needs to be specified.
Currently, the uplink configuration required by user equipment receivers for in-band contiguous LTE carrier aggregation with two uplink carriers and three downlink carriers is specified in the 3GPP standard (in table 7.3.1A-1 of TS 36.101) and the uplink configuration required by user equipment receivers for inter-band and in-band non-contiguous LTE carrier aggregation with two uplink carriers and downlink carriers is specified in the 3GPP standard (in tables 7.3.1A-0f and 7.3.1A-4 of TS 36.101, respectively). However, the uplink configuration required by the user equipment receiver for other LTE carrier aggregation scenarios with more than one uplink carrier is not specified in the 3GPP standard.
Fig. 1 illustrates the uplink configuration required by a user equipment receiver for in-band contiguous LTE carrier aggregation with two uplink carriers and three downlink carriers as specified in clause 7.3.1A of TS 36.101:
1. where downlink carrier aggregation configurations have one or more additional secondary component carriers as compared to uplink carrier aggregation configurations, those are configured to be farther from the uplink frequency band.
2. The carrier center frequency of the secondary component carrier in the uplink operating band is configured to be closer to the downlink operating band.
3. The uplink resource blocks in the primary component carrier should be located as close as possible to the downlink operating band, while the uplink resource blocks in the secondary component carrier should be located as far as possible from the downlink operating band.
Fig. 2 illustrates the uplink configuration required by the user equipment receiver for in-band non-contiguous LTE carrier aggregation with one uplink carrier and two downlink sub-blocks (two or three downlink carriers) specified in clause 7.3.1A of TS 36.101:
1. the carrier center frequency of the primary component carrier in the uplink operating band is configured to be closer to the downlink operating band.
2. The uplink resource blocks should be as close as possible to the downlink operating band but should be confined within the transmission band.
As can be seen from the above, in case of carrier aggregation with fewer uplink carriers than downlink carriers, the secondary component carrier uplink is configured closer to the downlink operating band for in-band contiguous carrier aggregation, while the primary component carrier uplink is configured closer to the downlink operating band for in-band non-contiguous carrier aggregation. Therefore, it is a disclosed problem whether the primary component carrier uplink or the secondary component carrier uplink should be configured closer to the downlink operating band for mixed intra-band (contiguous and non-contiguous) and inter-band carrier aggregation with two uplink carriers and three/four uplink carriers.
Thus, a method is provided. The method may allocate resource blocks. The allocation of resource blocks may be to support carrier aggregation communication.
The communication may be between network nodes of a wireless telecommunications network. The method can comprise the following steps: a first set of uplink resource blocks is allocated from within one or more uplink frequency bands. The first resource block group may be allocated for uplink primary component carrier usage. The method may further comprise: a second uplink resource block group is allocated. The second uplink resource block group may be from within one or more uplink frequency bands. The second uplink resource block group may be used by one or more uplink secondary component carriers. The first uplink resource block group and the second uplink resource block group may be allocated from resource blocks within one or more uplink frequency bands such that the first uplink resource block group is allocated from those resource block groups that are closer to resource blocks within one or more downlink frequency bands than the second resource block group. In this way, the resource blocks used by the uplink primary component carrier are always closer in frequency to the downlink frequency band than the resource blocks allocated to any uplink secondary component carrier. This ensures that the most demanding situation for allocating resource blocks in the uplink is considered to be due to the proximity of the uplink primary component carrier to the downlink frequency band, which maximises any leakage from the uplink to the downlink frequency band and any potential cross-coupling, which can be tested in checking the performance compliance of the user equipment under such most demanding conditions.
In one embodiment, the frequency separation between a first uplink resource block allocated for use by the uplink primary component carrier and resource blocks within the at least one downlink frequency band is less than the frequency separation between a second uplink resource block allocated for use by the at least one uplink secondary component carrier and resource blocks within the at least one downlink frequency band. Thus, the frequency difference between the uplink primary component carrier and the downlink frequency band may be smaller than the frequency difference between any uplink secondary component carrier and the downlink frequency band. This ensures that the uplink primary component carrier is closer in frequency to the downlink frequency band than any uplink secondary component carrier, again maximising any leakage and any potential cross-coupling from the uplink to the downlink frequency band.
In one embodiment, the center frequency of the uplink primary component carrier is closer to the at least one downlink frequency band than the center frequency of the at least one uplink secondary component carrier. Thus, the center frequency of the uplink primary component carrier may be set closer to any downlink frequency band than the center frequency of any secondary component carrier.
In one embodiment, when the carrier aggregation comprises continuous uplink carrier aggregation, the allocating comprises: allocating consecutive first and second uplink resource blocks within at least one uplink frequency band for uplink primary component carrier and at least one uplink secondary component carrier usage. Thus, when contiguous uplink carrier aggregation is to occur, an uplink primary component carrier and one or more uplink secondary component carriers may be allocated from contiguous resource blocks within one or more uplink frequency bands.
In one embodiment, when the carrier aggregation comprises continuous uplink carrier aggregation, the allocating comprises: resource blocks for transmitting data are allocated from the first uplink resource block for uplink primary component carrier usage furthest from the resource blocks within the at least one downlink frequency band.
Thus, when consecutive uplink carrier aggregation is to occur, resource blocks for transmitting data may be allocated to those resource blocks within the first resource block group that are furthest from the one or more downlink frequency bands. That is, of all available resource blocks allocated to the uplink primary component carrier, those resource blocks furthest away from the downlink band are used first for transmitting data, since those resource blocks furthest away from the downlink band will still be contiguous with any uplink secondary component carrier.
In one embodiment, when the carrier aggregation comprises continuous uplink carrier aggregation, the allocating comprises: resource blocks for transmitting data are allocated from the second uplink resource block for use by at least one uplink secondary component carrier closest to the resource blocks within the at least one downlink frequency band. Thus, when consecutive uplink carrier aggregation is to occur, resource blocks for transmitting data may be allocated to those resource blocks within the second resource block group that are closest to the one or more downlink frequency bands. That is, of all available resource blocks allocated to the uplink secondary component carrier, those resource blocks closest to the downlink frequency band are used first for transmitting data, since those resource blocks closest to the downlink frequency band will still be contiguous with the primary component carrier.
In one embodiment, when the carrier aggregation comprises non-continuous uplink carrier aggregation, the allocating comprises: non-contiguous first and second uplink resource blocks within the at least one uplink frequency band are allocated for use by the uplink primary component carrier and the at least one uplink secondary component carrier. Thus, when non-contiguous uplink carrier aggregation is to occur, an uplink primary component carrier and any uplink secondary component carriers may be allocated from non-contiguous resource blocks within one or more uplink frequency bands.
In one embodiment, when the carrier aggregation comprises non-continuous uplink carrier aggregation, the allocating comprises: resource blocks for transmitting data are allocated from the first uplink resource block for uplink primary component carrier use, the resource blocks being closest to resource blocks within at least one downlink frequency band. Since contiguous resource blocks are not required for transmission over the uplink primary component carrier and any uplink secondary component carrier, those resource blocks of the uplink primary component carrier that are closest to the downlink frequency band may be used for transmission first in order to maximize any leakage and any potential cross-coupling from the uplink to the downlink frequency band.
In one embodiment, when the carrier aggregation comprises non-continuous uplink carrier aggregation, the allocating comprises: resource blocks for transmitting data are allocated from the second uplink resource blocks for use by at least one uplink secondary component carrier for transmitting data, the resource blocks being closest to resource blocks within at least one downlink frequency band. Since there is no need for contiguous resource blocks for transmission over the uplink primary component carrier and any uplink secondary component carrier, those resource blocks of the uplink secondary component carrier that are closest to the downlink frequency band may be used for transmission first in order to maximize any leakage and any potential cross-coupling from the uplink to the downlink frequency band.
In one embodiment, the method comprises: allocating first downlink resource blocks within the at least one downlink frequency band for downlink primary component carrier usage and allocating second downlink resource blocks within the at least one downlink frequency band for at least one downlink secondary component carrier usage, the first downlink resource blocks allocated for downlink primary component carrier usage being allocated from resource blocks within the at least one downlink frequency band that are further from resource blocks within the at least one uplink frequency band than the second downlink resource blocks allocated for at least one downlink secondary component carrier usage.
In one embodiment, the assigning: including allocating resource blocks to maintain a constant frequency spacing between the uplink primary component carrier and the downlink primary component carrier and between each uplink secondary component carrier and the corresponding downlink secondary component carrier. Providing a constant or fixed frequency offset between each uplink component carrier and downlink component carrier significantly simplifies the operation of the user equipment.
In one embodiment, the allocation method may be performed by a test device or a base station of the wireless telecommunications network. The allocation may signal a user equipment of the wireless telecommunications network. Similarly, the method of allocating resource blocks may be performed by user equipment of the wireless telecommunications network in response to such signalling from the test equipment or base station.
According to a second aspect, there is provided a network node of a wireless telecommunications network comprising allocation logic operable to allocate a first block of uplink resources within at least one uplink frequency band for uplink primary component carrier usage, to allocate a second block of uplink resources within the at least one uplink frequency band for at least one uplink secondary component carrier usage, the allocation logic being operable to allocate the first block of uplink resources for uplink primary component carrier usage from a block of resources within the at least one uplink frequency band which is closer to the block of resources within the at least one downlink frequency band than the second block of uplink resources allocated for the at least one uplink secondary component carrier usage.
In one embodiment, the frequency separation between a first uplink resource block allocated for use by the uplink primary component carrier and resource blocks within the at least one downlink frequency band is less than the frequency separation between a second uplink resource block allocated for use by the at least one uplink secondary component carrier and resource blocks within the at least one downlink frequency band.
In one embodiment, the center frequency of the uplink primary component carrier is closer to the at least one downlink frequency band than the center frequency of the at least one uplink secondary component carrier.
In one embodiment, when the carrier aggregation comprises contiguous uplink carrier aggregation, the allocation logic is operable to allocate contiguous first and second blocks of uplink resources within the at least one uplink frequency band for uplink primary component carrier and at least one uplink secondary component carrier use.
In one embodiment, when the carrier aggregation comprises consecutive uplink carrier aggregation, the allocation logic is operable to allocate resource blocks for transmitting data from a first uplink resource block for uplink primary component carrier use, the resource blocks being furthest from resource blocks of at least one downlink frequency band.
In one embodiment, when the carrier aggregation comprises consecutive uplink carrier aggregation, the allocation logic is operable to allocate resource blocks for transmitting data from the second uplink resource block for use by the at least one uplink secondary component carrier, the resource blocks being closest to resource blocks within the at least one downlink frequency band.
In one embodiment, the allocation logic is operable to allocate non-contiguous first and second blocks of uplink resources within the at least one uplink frequency band for uplink primary component carrier and at least one uplink secondary component carrier usage when the carrier aggregation comprises non-contiguous uplink carrier aggregation.
In one embodiment, when the carrier aggregation comprises non-contiguous uplink carrier aggregation, the allocation logic is operable to allocate resource blocks for transmitting data from a first uplink resource block for uplink primary component carrier use, the resource blocks being closest to resource blocks within at least one downlink frequency band.
In one embodiment, when the carrier aggregation comprises non-contiguous uplink carrier aggregation, the allocation logic is operable to allocate resource blocks for transmitting data from the second uplink resource blocks for use by at least one uplink secondary component carrier for transmitting data, the resource blocks being closest to resource blocks within the at least one downlink frequency band.
In one embodiment, the allocation logic is operable to allocate first downlink resource blocks within the at least one downlink frequency band for downlink primary component carrier use and to allocate second downlink resource blocks within the at least one downlink frequency band for at least one downlink secondary component carrier use, the first downlink resource blocks allocated for downlink primary component carrier use being allocated from resource blocks within the at least one downlink frequency band which are further from resource blocks within the at least one uplink frequency band than the second downlink resource blocks allocated for at least one downlink secondary component carrier use.
In one embodiment, the allocation logic is operable to allocate resource blocks to maintain a constant frequency separation between the uplink primary component carrier and the downlink primary component carrier and between each uplink secondary component carrier and the corresponding downlink secondary component carrier.
According to a third aspect, there is provided a computer program product operable, when executed on a computer, to perform the method acts of the first aspect.
Other specific and preferred aspects are set out in the accompanying independent and dependent claims. Features of the dependent claims may be combined with features of the independent claims as appropriate and the combination may be other than those specifically set out in the claims.
Where an apparatus feature is described as being operable to provide a function, it will be appreciated that this includes an apparatus feature that provides the function or is adapted or configured to provide the function.
Drawings
Embodiments of the invention will now be further described with reference to the accompanying drawings, in which:
fig. 1 illustrates the uplink configuration required by a user equipment receiver for in-band contiguous LTE carrier aggregation with two uplink carriers and three downlink carriers as specified in clause 7.3.1A of TS 36.101;
fig. 2 illustrates the uplink configuration required by the user equipment receiver for in-band non-contiguous LTE carrier aggregation with one uplink carrier and two downlink sub-blocks (two or three downlink carriers) specified in clause 7.3.1A of TS 36.101;
fig. 3 illustrates resource block allocation for mixed in-band (continuous and non-continuous) carrier aggregation with two continuous uplink carriers and three downlink carriers;
fig. 4 illustrates resource block allocation for mixed in-band (continuous and non-continuous) carrier aggregation with two continuous uplink carriers and four downlink carriers;
fig. 5 illustrates resource block allocation for mixed intra-band and inter-band carrier aggregation with two consecutive uplink carriers and three downlink carriers; and
fig. 6 illustrates resource block allocation for mixed intra-band and inter-frequency carrier aggregation with two non-contiguous uplink carriers and three downlink carriers.
Detailed Description
Before discussing the embodiments in more detail, an overview will first be provided. Embodiments recognize that various configurations are possible for mixed intra-band (contiguous and non-contiguous) and inter-band carrier aggregation. These configurations place increasingly higher demands on the performance on the user equipment. In particular, the closer the uplink carrier is to the downlink carrier, the greater the effect of transmitter leakage on receiver sensitivity. However, if the user equipment is able to operate satisfactorily in a more demanding configuration, the user equipment should also be able to operate in a less demanding configuration.
When testing the performance of the user equipment, the test equipment may instruct the configurations to ensure that they operate satisfactorily under these more demanding conditions. These configurations may also be instructed by the base station in the actual deployment. In particular, for at least two uplink carriers and three downlink carriers, four downlink carriers, or more downlink carriers, the carrier center frequency of the primary component carrier in the uplink operating band is configured to be closer to the downlink operating band than the uplink secondary component carrier.
For the case of contiguous uplink carriers, in order to form a contiguous uplink allocation, the uplink resource blocks in the uplink primary component carrier are located as far away from the downlink operating band as possible, while the uplink resource blocks in the uplink secondary component carrier are located as close to the downlink operating band as possible.
For the case of non-contiguous uplink carriers, the uplink resource blocks should be located as close to the downlink operating band as possible, but limited to within the allocated blocks. If the uplink resource block is not allowed without desensitization, the uplink resource allocation is moved to the far end of the uplink operating band. It will be appreciated that this arrangement is also applicable to carrier aggregation cases with two uplink and more than four downlink carriers.
Hybrid inband (contiguous and non-contiguous) carrier aggregation
Two consecutive uplink carriers and three downlink carriers
Fig. 3 illustrates resource block allocation for mixed intra-band (contiguous and non-contiguous) carrier aggregation with two contiguous uplink carriers and three downlink carriers. It can be seen that within the downlink operating frequency band, a downlink primary component carrier and two downlink secondary component carriers are provided. The downlink primary component carrier is contiguous with one of the downlink secondary component carriers, but the other downlink secondary component carrier is non-contiguous.
Within the uplink operating frequency band, resource blocks are allocated to the uplink primary component carrier 10A and the uplink secondary component carrier 20A. The resource blocks allocated to the uplink primary component carrier 10A and the uplink secondary component carrier 20A are contiguous within the uplink operating frequency band. From within these resource blocks, the resource blocks 15A for transmitting data within the uplink primary component carrier 10A and the resource blocks 25A for transmitting data within the uplink secondary component carrier 20A are also arranged to be contiguous. As can be seen in this arrangement, the resource blocks 15A allocated to the uplink primary component carrier 10A are those within the uplink operating band which are confined within the uplink primary component carrier 10A and are further from the downlink operating band. That is, the frequency interval between the uplink primary component carrier and the downlink primary component carrier is minimized. However, the resource blocks 25A allocated for any uplink secondary component carrier are selected from the resource blocks confined within the uplink secondary component carrier 20A and closest to the downlink operating band.
As can be seen from fig. 3, the frequency interval between the uplink primary component carrier 10A and the downlink primary component carrier is the same as the frequency interval between the uplink secondary component carrier 20A and the downlink secondary component carrier. Such constant frequency offset or spacing helps to simplify the operation of the user equipment. If additional uplink secondary component carriers need to be added, those component carriers will be added to maintain a constant frequency offset as outlined in fig. 3.
Hybrid inband (contiguous and non-contiguous) carrier aggregation
Two consecutive uplink carriers and four downlink carriers
Fig. 4 illustrates resource block allocation for mixed in-band (contiguous and non-contiguous) carrier aggregation with two contiguous uplink carriers and four downlink carriers. As can be seen, within the downlink operating frequency band, a downlink primary component carrier and three downlink secondary component carriers are provided. The downlink primary component carrier is contiguous with two of the downlink secondary component carriers, but the other downlink secondary component carrier is non-contiguous.
Within the uplink operating frequency band, resource blocks are allocated to the uplink primary component carrier 10B and the uplink secondary component carrier 20B. The resource blocks allocated to the uplink primary component carrier 10B and the uplink secondary component carrier 20B are contiguous within the uplink operating frequency band. From within these resource blocks, the resource blocks 15B for transmitting data within the uplink primary component carrier 10B and the resource blocks 25B for transmitting data within the uplink secondary component carrier 20B are also arranged to be contiguous. It can be seen in this arrangement that the resource blocks 15B allocated to the uplink primary component carrier 10B are those within the uplink operating band which are confined within the uplink primary component carrier 10B and are further from the downlink operating band. That is, the frequency interval between the uplink primary component carrier and the downlink primary component carrier is minimized. However, the resource blocks 25B allocated for any uplink secondary component carrier are selected from the resource blocks confined within the uplink secondary component carrier 20B and closest to the downlink operating band.
As can be seen from fig. 4, the frequency interval between the uplink primary component carrier 10B and the downlink primary component carrier is the same as the frequency interval between the uplink secondary component carrier 20B and the downlink secondary component carrier. Such constant frequency offset or spacing helps to simplify the operation of the user equipment. If additional uplink secondary component carriers need to be added, these component carriers will be added to maintain a constant frequency offset as outlined in fig. 4.
Hybrid inband and interband carrier aggregation
Two consecutive uplink carriers and three downlink carriers
Fig. 5 illustrates resource block allocation for mixed intra-band and inter-band carrier aggregation with two contiguous uplink carriers and three downlink carriers. It can be seen that within the downlink operating band y, a downlink primary component carrier and a downlink secondary component carrier are provided. The downlink primary component carrier is contiguous with the downlink secondary component carrier, but the other downlink secondary component carrier is non-contiguous and provided within the downlink operating band x.
Within the uplink operating band y, resource blocks are allocated to the uplink primary component carrier 10C and the uplink secondary component carrier 20C. The resource blocks allocated to the uplink primary component carrier 10C and the uplink secondary component carrier 20C are contiguous within the uplink operating frequency band. From within these resource blocks, the resource block 15C for transmitting data within the uplink primary component carrier 10C and the resource block 25C for transmitting data within the uplink secondary component carrier 20C are also arranged to be contiguous. In this arrangement it can be seen that the resource blocks 15C allocated to the uplink primary component carrier 10C are restricted to those within the uplink primary component carrier 10C and within the uplink operating band which are further away from the downlink operating band. That is, the frequency interval between the uplink primary component carrier and the downlink primary component carrier is minimized. However, the resource blocks 25C allocated for any uplink secondary component carrier are selected from the resource blocks confined within the uplink secondary component carrier 20C and closest to the downlink operating band.
As can be seen from fig. 5, the frequency interval between the uplink primary component carrier 10C and the downlink primary component carrier is the same as the frequency interval between the uplink secondary component carrier 20C and the downlink secondary component carrier. This constant frequency offset or separation helps to simplify the operation of the user equipment. If additional uplink secondary component carriers need to be added, these component carriers will be added in the uplink operating band x to maintain a constant frequency offset, as outlined in fig. 5.
Hybrid inband and interband carrier aggregation
Two non-contiguous uplink carriers and three downlink carriers
Fig. 6 illustrates resource block allocation for mixed intra-band and inter-band carrier aggregation with two non-contiguous uplink carriers and three downlink carriers. It can be seen that within the downlink operating band y, a downlink primary component carrier and a downlink secondary component carrier are provided. The downlink primary component carrier is contiguous with the downlink secondary component carrier, but the other downlink secondary component carrier is non-contiguous and provided within the downlink operating band x.
Within the uplink operating band y, resource blocks are allocated to the uplink primary component carrier 10D. Within the uplink operating band x, resource blocks are allocated to the uplink secondary component carrier 20D. The resource blocks allocated to the uplink primary component carrier 10D and the uplink secondary component carrier 20D are discontinuous within different uplink operating frequency bands. From within these resource blocks, the resource block 15D for transmitting data within the uplink primary component carrier 10D and the resource block 25D for transmitting data within the uplink secondary component carrier 20D are also arranged to be non-contiguous. As can be seen in this arrangement, the resource blocks 15D allocated to the uplink primary component carrier 10D are those within the uplink operating frequency band which are closest to the downlink operating frequency band. That is, the frequency interval between the uplink primary component carrier and the downlink primary component carrier is minimized. Further, the resource blocks 25D allocated to the uplink secondary component carrier 20D are those within the uplink operating band that is closest to the downlink operating band. That is, the frequency spacing between these resource blocks is minimized.
As can be seen from fig. 6, the frequency interval between the uplink primary component carrier 10D and the downlink primary component carrier is the same as the frequency interval between the uplink secondary component carrier 20D and the downlink secondary component carrier. Such constant frequency offset or spacing helps to simplify the operation of the user equipment. If additional uplink secondary component carriers need to be added, these component carriers will be added in the uplink operating band y as outlined in fig. 6 to maintain a constant frequency offset.
Thus, it can be seen that the uplink configuration for user equipment receiver requirements (reference sensitivity etc.) for mixed intra-band (contiguous and non-contiguous) and inter-band LTE carrier aggregation with two uplink and three or four downlink carriers is specified and puts more demanding requirements on the user equipment receiver requirements.
Those skilled in the art will readily recognize that the acts of the various above-described methods may be performed by a programmed computer. Herein, some embodiments are also intended to cover program storage devices, e.g., digital data storage media, which are machine-readable or computer-readable and encode a machine-executable or computer-executable program of instructions, wherein the instructions perform some or all of the acts of the above-described methods. The program storage device may be, for example, a digital memory, a magnetic storage medium such as a magnetic disk and magnetic tape, a hard disk drive, or an optically readable digital data storage medium. These embodiments are also intended to cover a computer programmed to perform the actions of the method described above.
The functions of the various elements shown in the figures, including any functional blocks labeled as "processors" or "logic," may be provided through the use of dedicated hardware as well as hardware capable of executing software in association with appropriate software. When provided by a processor, the functions may be provided by a single dedicated processor, by a single shared processor, or by a plurality of individual processors, some of which may be shared. Moreover, explicit use of the term "processor" or "controller" or "logic" should not be construed to refer exclusively to hardware capable of executing software, and may implicitly include, without limitation, Digital Signal Processor (DSP) hardware, network processor, Application Specific Integrated Circuit (ASIC), Field Programmable Gate Array (FPGA), Read Only Memory (ROM) for storing software, Random Access Memory (RAM), and non volatile storage. Other hardware (conventional and/or custom) may also be included. Similarly, any switches shown in the figures are conceptual only. Their function may be carried out through the operation of program logic, through dedicated logic, through the interaction of program control and dedicated logic, or even manually, the particular technique being selectable by the implementer as more specifically understood from the context.
It will be appreciated by those skilled in the art that any block diagrams herein represent conceptual views of illustrative circuitry embodying the principles of the invention. Similarly, it will be appreciated that any flow charts, flow diagrams, state transition diagrams, pseudocode, and the like represent various processes which may be substantially represented in computer readable media and so executed by a computer or processor, whether or not such computer or processor is explicitly shown.
The specification and drawings merely illustrate the principles of the invention. It will thus be appreciated that those skilled in the art will be able to devise various arrangements which, although not explicitly described or shown herein, embody the principles of the invention and are included within its spirit and scope. Furthermore, all examples recited herein are principally intended expressly to be only for pedagogical purposes to aid the reader in understanding the principles of the invention and the concepts contributed by the inventor to furthering the art, and are to be construed as being without limitation to such specifically recited examples and conditions. Moreover, all statements herein reciting principles, aspects, and embodiments of the invention, as well as specific examples thereof, are intended to encompass equivalents thereof.
Claims (13)
1. A method of allocating resource blocks to support carrier aggregation communication between network nodes of a wireless telecommunications network, comprising:
allocating a first uplink resource block within at least one uplink frequency band for use by an uplink primary component carrier; and
allocating a second block of uplink resources within at least one uplink frequency band for use by at least one uplink secondary component carrier, the first block of uplink resources allocated for use by the uplink primary component carrier being allocated from a block of resources within at least one uplink frequency band that is closer to a block of resources within at least one downlink frequency band than the second block of uplink resources allocated for use by the at least one uplink secondary component carrier.
2. The method of claim 1, wherein a frequency separation between the first uplink resource blocks allocated for the uplink primary component carrier and the resource blocks within the at least one downlink frequency band is less than a frequency separation between the second uplink resource blocks allocated for use by the at least one uplink secondary component carrier and the resource blocks within the at least one downlink frequency band.
3. The method according to claim 1 or 2, wherein a center frequency of the uplink primary component carrier is closer to the at least one downlink frequency band than a center frequency of the at least one uplink secondary component carrier.
4. The method of claim 1, wherein when the carrier aggregation comprises continuous uplink carrier aggregation, the allocating comprises: allocating consecutive first and second uplink resource blocks within the at least one uplink frequency band for use by the uplink primary component carrier and the at least one uplink secondary component carrier.
5. The method of claim 1, wherein when the carrier aggregation comprises continuous uplink carrier aggregation, the allocating comprises: allocating resource blocks furthest from resource blocks within at least one downlink frequency band for transmitting data from the first uplink resource block for use by the uplink primary component carrier.
6. The method of claim 1, wherein when the carrier aggregation comprises continuous uplink carrier aggregation, the allocating comprises: allocating a resource block closest to a resource block within at least one downlink frequency band for transmitting data from the second uplink resource block for use by the at least one uplink secondary component carrier.
7. The method of claim 1, wherein when the carrier aggregation comprises discontinuous uplink carrier aggregation, the allocating comprises: allocating non-contiguous first and second uplink resource blocks within the at least one uplink frequency band for use by the uplink primary component carrier and the at least one uplink secondary component carrier.
8. The method of claim 1, wherein when the carrier aggregation comprises discontinuous uplink carrier aggregation, the allocating comprises: allocating resource blocks closest to resource blocks within at least one downlink frequency band for transmitting data from the first uplink resource block for use by the uplink primary component carrier.
9. The method of claim 1, wherein when the carrier aggregation comprises discontinuous uplink carrier aggregation, the allocating comprises: allocating resource blocks closest to resource blocks within at least one downlink frequency band for transmitting data from the second uplink resource blocks for use by the at least one uplink secondary component carrier for transmitting data.
10. The method of claim 1, comprising: allocating first downlink resource blocks within at least one downlink frequency band for use by a downlink primary component carrier and allocating second downlink resource blocks within at least one downlink frequency band for use by at least one downlink secondary component carrier, the first downlink resource blocks allocated for use by the downlink primary component carrier being allocated from resource blocks within the at least one downlink frequency band that are further from resource blocks within the at least one uplink frequency band than the second downlink resource blocks allocated for use by the at least one downlink secondary component carrier.
11. The method of claim 10, wherein the assigning comprises: allocating resource blocks to maintain a constant frequency spacing between the uplink primary component carrier and the downlink primary component carrier, and between each uplink secondary component carrier and a corresponding downlink secondary component carrier.
12. A network node of a wireless telecommunications network, comprising:
allocation logic operable to allocate a first block of uplink resources within at least one uplink frequency band for use by an uplink primary component carrier and a second block of uplink resources within at least one uplink frequency band for use by at least one uplink secondary component carrier, the allocation logic being operable to allocate the first block of uplink resources for use by the uplink primary component carrier from a block of resources within at least one uplink frequency band that is closer to the block of resources within the at least one downlink frequency band than the second block of uplink resources allocated for use by the at least one uplink secondary component carrier.
13. A computer-readable storage medium, on which a computer program is stored which, when executed by a computer, causes the computer to carry out the method steps according to any one of claims 1 to 11.
Applications Claiming Priority (3)
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| EP15306295.5 | 2015-08-14 | ||
| EP15306295.5A EP3131226A1 (en) | 2015-08-14 | 2015-08-14 | Carrier aggregation |
| PCT/EP2016/069217 WO2017029212A1 (en) | 2015-08-14 | 2016-08-12 | Carrier aggregation |
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| CN108028744A CN108028744A (en) | 2018-05-11 |
| CN108028744B true CN108028744B (en) | 2021-03-02 |
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| CN201680055292.6A Active CN108028744B (en) | 2015-08-14 | 2016-08-12 | Method for carrier aggregation, network node and computer-readable storage medium |
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| EP (1) | EP3131226A1 (en) |
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| ES2763923T3 (en) * | 2009-06-15 | 2020-06-01 | Guangdong Oppo Mobile Telecommunications Corp Ltd | System and procedure to share a control channel for carrier aggregation |
| KR20120028394A (en) * | 2009-06-18 | 2012-03-22 | 인터디지탈 패튼 홀딩스, 인크 | Operating in a discontinuous reception mode employing carrier aggregation |
| CN102055700B (en) * | 2009-10-28 | 2015-06-03 | 中兴通讯股份有限公司 | Method and device for CC configuration in CA |
| CN102783077A (en) * | 2010-01-12 | 2012-11-14 | 诺基亚西门子通信公司 | Apparatus and method for scheduling in carrier aggregated communication systems based on a transmit-receive-frequency gap band |
| US8555301B2 (en) * | 2010-03-04 | 2013-10-08 | Lg Innotek Co., Ltd. | Integrated disk driving module including a lateral surface plate bent from an upper plate |
| ES2614610T3 (en) * | 2010-04-01 | 2017-06-01 | Alcatel Lucent | Carrier aggregation optimized for handover |
| US20110267948A1 (en) * | 2010-05-03 | 2011-11-03 | Koc Ali T | Techniques for communicating and managing congestion in a wireless network |
| US8422429B2 (en) * | 2010-05-04 | 2013-04-16 | Samsung Electronics Co., Ltd. | Method and system for indicating the transmission mode for uplink control information |
| US8665810B2 (en) * | 2010-06-04 | 2014-03-04 | Htc Corporation | Method of performing uplink transmission and related communication device |
| KR102073027B1 (en) * | 2011-04-05 | 2020-02-04 | 삼성전자 주식회사 | Method and appratus of operating multiple time alignment timer in mobile communication system using carrier aggregation |
| US9083497B2 (en) * | 2011-03-04 | 2015-07-14 | Lg Electronics Inc. | Method and device for setting backhaul link subframe in wireless communication system having carrier aggregation technique applied thereto |
| US9577802B2 (en) * | 2011-11-07 | 2017-02-21 | Telefonaktiebolaget Lm Ericsson (Publ) | Methods, network node, and user equipment related to channel spacing |
| CN103543296B (en) * | 2012-07-17 | 2017-08-04 | 鸿富锦精密工业（深圳）有限公司 | Test table |
| US9654274B2 (en) * | 2012-11-09 | 2017-05-16 | Telefonaktiebolaget L M Ericsson (Publ) | Systems and methods for mitigating self-interference |
| KR101413351B1 (en) * | 2013-01-21 | 2014-06-27 | 엘지전자 주식회사 | Method for transmitting uplink signal using reduced number of resource blocks to prevent a deterioration of reference sensitivity in intra non-contiguous carrier aggregation and terminal thereof |
| DE102015201432B4 (en) * | 2014-02-03 | 2022-07-14 | Apple Inc. | Methods and devices for communication in unlicensed radio frequency bands by mobile wireless devices |
| US9537642B2 (en) * | 2014-02-03 | 2017-01-03 | Apple Inc. | Method and apparatus for frequency hopping coexistence in unlicensed radio frequency bands for mobile devices |
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| US20190053096A1 (en) | 2019-02-14 |
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